[ffwd][train-only] Run keystone endpoint configuration on FFWD

By default during FFWD we run all tasks with --limit and we never
specify Undercloud. This means we never run the
external_post_deployment_tasks which sets up the keystone
endpoints. This is intended as we don't want to trigger most of
external deployment tasks at that point. Solution to missing
endpoints is to run the keystone setup during post_upgrade_tasks.

Change-Id: Ic1e63ca773fb20f10f16fc3835f8f263cb3b6929
Resolves: rhbz#1944108

deployment/keystone/keystone-container-puppet.yaml

@@ -774,7 +774,7 @@ outputs:
           when:
             - step|int == 4
             - not ansible_check_mode|bool
-          block:
+          block: &keystone_endpoints
             - name: Manage Keystone resources for OpenStack services
               include_role:
                 name: tripleo-keystone-resources
@@ -814,6 +814,13 @@ outputs:
       host_prep_tasks: {get_attr: [KeystoneLogging, host_prep_tasks]}
       metadata_settings:
         get_attr: [ApacheServiceBase, role_data, metadata_settings]
+      post_upgrade_tasks:
+        - name: Run the keystone endpoint creation
+          when:
+            - step|int == 1
+            - keystone_short_bootstrap_node_name|lower == ansible_facts['hostname']|lower
+          delegate_to: undercloud
+          block: *keystone_endpoints
       external_upgrade_tasks:
         - when:
             - step|int == 1